DE102019129161B4 - Device for adjusting a seat position - Google Patents

Abstract

Device (2) for adjusting a seat position for a vehicle seat (1), which comprises at least one carrier element (3) for a seat part (4) and can be connected to a seat substructure (5), characterized in that the device (2) has at least one first leg (6) and at least one second leg (7), wherein the legs (6, 7) can be arranged rotatably on the seat substructure (5) and the at least one support element (3), the at least one first leg (6) and the at least one second leg (7) are mechanically coupled by a connecting element (19) whose length is modifiable, wherein a modification of the length of the connecting element (19) causes a change in an inclination angle (θ) of the support element (3), wherein the at least one first leg (6) and the at least one second leg (7) rotate about a respective axis of rotation (11, 12) relative to the carrier element (3) and about a further axis of rotation (13, 14) each relative to the seat substructure (5 ) are rotatably mounted and wherein the modification of the length of the connecting element (19) involves a rotation of the at least one second leg (7) about at least the axis of rotation (16) with respect to a rotation relative to the connecting element (19) and about the axis of rotation (14) with respect causing a rotation relative to the seat base (5), wherein the modification of the length of the connecting element (19) does not cause any rotation of the at least one first leg (6) and wherein at least one second leg (7) is indirectly connected to the at least one support element (3) connected, the at least one second leg (7) being connected to the carrier element (3) via a spacer element (33), the spacer element (33) being rotatable about an axis of rotation (12) relative to the at least one second leg (7). is, wherein the spacer element (33) is rotatable about a further axis of rotation (34) relative to the carrier element (3).

Description

The invention relates to a device for adjusting a seat position for a vehicle seat, the device being connectable to at least one support element for a seat part and a seat substructure.

Such devices are intended in particular for vehicle seats in commercial vehicles such as tractors, construction machinery, forklifts, trucks, etc. Such vehicle seats, in particular driver's seats, in commercial vehicles have to meet special requirements in terms of seat ergonomics, since the occupants, or drivers, usually have to spend a long time in them. It is desirable that the vehicle seat can be optimally adjusted with regard to different seating positions. Furthermore, it must be taken into account that the vehicle seat is used by occupants of different sizes and must therefore be adjusted accordingly. Such a large number of adjustment possibilities of the vehicle seat often causes an undesired complexity of the vehicle seat.

EP 0 882 619 A2 describes a device for adjusting a seat position for a vehicle seat, which comprises a carrier element for a seat part and can be connected to a seat substructure.

DE 34 47 040 A1 shows a height-adjustable vehicle seat in which a seat support is connected to an underframe via an articulated lever.

EP 1 863 671 B1 relates to a suspension seat for a vehicle having an upper frame with an adjustable height and an adjustable angle of inclination in relation to a lower frame.

DE 10 2017 213 169 A1 shows a motor vehicle seat without rails and a motor vehicle equipped with it.

DE 199 14 163 A1 relates to a vehicle seat with a backrest attached separately to a longitudinally adjustable seat rail.

DE 26 26 442 A1 relates to a height-adjustable seat, the seat part of which is supported by a support which can be pivoted in a vertical plane and whose pivoting movements can be driven by two intermeshing dental arch members.

U.S. 3,917,211A shows a device for changing the angle and vertical alignment of two flat panels.

The object of the present invention is to provide a vehicle seat which solves the problems mentioned at the outset.

The object is achieved by a device for adjusting a seat position for a vehicle seat, which comprises at least one carrier element for a seat part and can be connected to a seat substructure, the device comprising at least one first leg and at least one second leg, the legs being rotatable on the The seat substructure and the at least one support element can be arranged, with the at least one first leg and the at least one second leg being mechanically coupled by a connecting element whose length can be modified, with a modification of the length of the connecting element causing a change in an angle of inclination θ of the support element, or of the seat part.

The at least one first leg and the at least one second leg are mounted such that they can rotate about a respective axis of rotation relative to the carrier element. Advantageously, the at least one first leg and the at least one second leg are each rotatably mounted about a further axis of rotation relative to the seat substructure. Modifying the length of the link causes rotation of the at least one second leg about at least the pivot axis for rotation relative to the link and about the pivot axis for rotation relative to the seat base. The modification of the length of the connecting element causes a rotation of the at least one second leg about the axis of rotation with respect to a rotation relative to the carrier element. The angle α is advantageously fixed when the length of the connecting element is modified. This can preferably be done by the angle adjustment device or the fixing element. Advantageously, the modification of the length of the connecting element does not cause any rotation of the at least one first leg. A rotation of the second leg causes the inclination angle θ to change.

The at least one second leg is indirectly connected to the at least one carrier element. At least the one second leg is advantageously connected to the at least one carrier element via a spacer element or a connecting rod. Two axes of rotation are thus advantageously provided with respect to a rotation of the second leg relative to the carrier element. These two axes of rotation are preferably arranged one above the other along the height axis Z, or spaced apart. This results in an advantageous additional freedom degree, which can be used to adjust an inclination of the seat part.

The at least one second leg is indirectly connected to the at least one carrier element. The at least one second leg is connected to the carrier element via a spacer element or a connecting rod. Advantageously, the spacer element or connecting rod can be rotated about an axis of rotation relative to the at least one second leg. The spacer element or connecting rod can be rotated about a further axis of rotation relative to the carrier element. The two axes of rotation mentioned are preferably spaced apart from one another. Accordingly, the at least one second leg is connected to the carrier element by means of two rotary brackets. Such a configuration provides an additional degree of freedom, which facilitates the inclination of the carrier element or the seat part.

The device according to the invention enables a simple adjustment of the inclination of the seat surface, the seat surface being the uppermost surface of the seat part on which the occupant sits. For some occupants, it is more comfortable if the seat is not exactly horizontal, but tilted slightly forward. Other occupants prefer the seat cushion to recline. From an ergonomic point of view, the seat should be inclined so much that your thighs rest lightly and without pressure on the seat part. The more the thigh is supported, the better the seat pressure is distributed. This leads to a noticeable relief, especially on long journeys. The device therefore enables an ergonomically relevant seat parameter to be set easily. Furthermore, the device has an extremely simple design and is therefore inexpensive to manufacture.

The device, or the vehicle seat, extends along a vertical axis Z. An advantageous displacement along the vertical axis Z can be downwards, ie in the direction of the vehicle floor, or upwards. The device, or the vehicle seat, also extends along a longitudinal axis X. An advantageous displacement along the longitudinal axis X can be forward, ie in the direction of the pedals, or backward. Finally, the device or the vehicle seat extends along a width axis Y.

The term "essentially" used below should be interpreted to mean that minor tolerance deviations are also claimed. Thus, the deviation can be an angle of preferably less than 10°, more preferably less than 7.5°, even more preferably less than 5°.

According to a particularly preferred embodiment, the angle of inclination θ extends between a central axis of the at least one carrier element and a reference axis, which is essentially parallel to a longitudinal axis X of the device. Accordingly, the at least one carrier element is arranged in a first plane, which includes the central axis. The seat surface of the seat part is advantageously arranged essentially parallel to the first plane. The reference axis is included in a reference plane, which is spanned by the longitudinal axis X and the width axis Y. The reference plane is preferably essentially parallel to a body floor. With a horizontal orientation of the at least one carrier element or the seat surface, the angle of inclination θ is essentially 0°. The inclination angle θ can be set preferably in a range between -60° and +60°, preferably in a range between -45° and +45°, more preferably in a range between -30° and +30°. In the case of an advantageous inclination backwards, the angle θ would therefore assume positive values. In the case of an advantageous forward inclination, the inclination angle θ would therefore assume negative values. Preferably, the change in the angle of inclination θ is proportional to the change in the length of the connecting element (19).

According to a particularly preferred embodiment, the connecting element is suitable and intended for maintaining its modifiable length, preferably until another modification is carried out. This means that the length of the connecting element is adjustable and the adjusted length is then maintained by the connecting element until it is adjusted again. The connecting element can advantageously be controlled by means of an operating and control device. It is advantageous here that the operating and control device includes a storage device, by means of which specific length values of the connecting element can be stored. Since the determined longitude values correspond to determined tilt angles θ, preferred tilt settings can thus be stored and selected accordingly by the user. The length of the connecting element is advantageously continuously adjustable.

According to a preferred embodiment, the connecting element is a lockable gas spring. According to a further advantageous embodiment, the connecting element is an actuating element. The actuating element preferably comprises a spindle lifting gear. This screw jack is driven by a corresponding advantageous actuator, which can preferably be an electric motor driven.

According to a particularly preferred embodiment, the at least one first leg is arranged along the longitudinal axis X behind the at least one second leg. It is advantageous here that the at least one first leg is connected along the longitudinal axis to the at least one second leg by means of a first longitudinal connection. The first longitudinal connection is advantageously realized by the at least one carrier element or by the seat part. Furthermore, it is advantageous that the at least one first leg and the at least one second leg are connected along the longitudinal axis X by means of a second longitudinal connection. The second longitudinal connection is preferably realized through the seat substructure. Preferably, the mechanical coupling comprises the first and the second longitudinal connection. Advantageously, the first and the second longitudinal connection are rigid connections and their length cannot therefore be changed.

A third longitudinal connection along the longitudinal axis X between the second section of the at least one first leg and the second section of the at least one second leg is preferably realized by the connecting element. The mechanical coupling advantageously includes the third longitudinal connection, the length of which can be modified.

According to a further preferred embodiment, the at least one first leg and the at least one second leg each have a first section and a second section. The first and the second section preferably enclose an angle β. As a result, the at least one first leg and the at least one second leg are advantageously of essentially L-shaped configuration. A kink area is preferably provided between the first section and the second section.

The axis of rotation is preferably arranged in an upper end area of the first section with regard to the rotation relative to the carrier element. The axis of rotation is preferably arranged in the buckling area with respect to the rotation relative to the seat substructure.

According to a further preferred embodiment, the connecting element is arranged between the second section of the first leg and the second section of the second leg. The mechanical coupling between the at least one first leg and the at least one second leg preferably includes a connection of the second sections by means of the connecting element. The respective second section can preferably be rotated about an axis of rotation relative to the connecting element. The axis of rotation is advantageously arranged in a lower end region of the respective second section with respect to a rotation of the at least one first leg or the at least one second leg relative to the connecting element.

According to a further advantageous embodiment, the at least one first leg and the carrier element enclose a first angle α. Preferably, this angle α can be adjusted by an angle adjustment device. A change in the angle α causes a displacement of the at least one carrier element along a vertical axis Z and along a longitudinal axis X. Preferably, a change in the angle α, which causes a displacement of the at least one carrier element downwards along the vertical axis Z, also causes a displacement of the at least a support member forward along the longitudinal axis X. Preferably, a change in the angle α, which causes an upward displacement of the at least one carrier element along the vertical axis Z, also causes a rearward displacement of the at least one carrier element along the longitudinal axis X. A displacement of the at least one support element therefore results in a corresponding displacement of the seat part arranged on the support element. The advantageous device is therefore used to adjust the seat position along the height axis Z with synchronous correction of the seat position along the longitudinal axis X. Such a synchronized adjustment along the height axis Z and at the same time along the longitudinal axis X results in a quick ergonomic adjustment of the seat position for small and large drivers . As a rule, small drivers need lower seat heights and at the same time have to sit further forward along the longitudinal axis X. In contrast, tall riders must position themselves further up along the height axis Z and further back along the longitudinal axis X. The seat position can thus be changed simultaneously downwards and forwards or upwards and backwards by operating the angle adjustment device. This enables extremely quick and easy adjustment of the seating position. The advantageous embodiment enables a simultaneous change in two other ergonomically relevant seat parameters, namely the seat height and the distance from the pedals. In order to adjust the seat position along the vertical axis Z and along the longitudinal axis X, only the advantageous angle adjustment device has to be actuated. Advantageously, the angle α is held by the angle adjustment device until it is actuated again. Accordingly, the angle setting device can also be regarded as an angle fixing device.

Adjusting the angle α accordingly changes the orientation of the at least one first leg. Accordingly, the first leg is advantageously turned or rotated about a corresponding direction of rotation. Due to the mechanical coupling between the at least one first leg and the at least one second leg, the rotation of the at least one first leg is transferred to the at least one second leg. Accordingly, the at least one second leg moves or rotates analogously to the at least one first leg. The displacement of the at least one carrier element or the seat part advantageously results from the movement of the entirety of the at least one first leg and the at least one second leg. Accordingly, the angle adjustment device can advantageously act directly only on the at least one first leg. The angle adjustment device preferably also acts indirectly on the at least one second leg through the aforementioned mechanical coupling.

Advantageously, the angle α extends between a central axis of the first leg and an imaginary reference line of the support element, which runs essentially perpendicularly to the seat part. The angle α is in a range between 0° and 140°. The angle α is preferably in a range between 0° and 120°. More preferably, the angle α is in a range between 0° and 90°. Advantageously, the change in the seat position along the height axis Z and along the longitudinal axis X is proportional to a change in the angle α.

An operating element is preferably provided, by means of which the angle adjustment device can be operated. Accordingly, only one control device has to be actuated to adjust the seating position. The vehicle seat can preferably also have at least one additional adjustment device for the seat position along the longitudinal axis X, by means of which an additional adjustment of the seat position is made possible. This enables individual adjustment of the seating position.

However, it would also be conceivable for the angle α to be fixed permanently by means of a corresponding fixing element. An adjustment of the seat position along the height direction Z, or along the longitudinal direction X, can be done by other appropriate devices.

According to a further preferred embodiment, the first section of the at least one first leg and the first section of the at least one second leg have the same length. With regard to the rotation relative to the carrier element of the at least one first leg and the at least one second leg, the axes of rotation preferably lie on a first fictitious or real connecting line. Furthermore, it is preferred that the axes of rotation with respect to the rotation relative to the seat substructure of the at least one first leg and the at least one second leg lie on a second fictitious or real connecting line. The first connecting line, the second connecting line and the first sections of the at least one first leg and the at least one second leg advantageously form a trapezium. Such a trapezoidal shape favors the simultaneous displacement of the seat along the vertical axis Z and the longitudinal axis X. The trapezium can be a parallelogram if the first sections each have the same length and furthermore the first and second connecting lines have the same length.

The connecting lines that form the advantageous trapezoid or parallelogram can therefore be real connecting lines, i. H. the connecting line is surrounded by a corresponding element, for example the seat substructure or the carrier element. However, it would also be conceivable that although there are connections between the legs, these do not represent direct connections between the axes of rotation. Accordingly, for example, the actual connections between the axes of rotation along the height axis Z could be above or below the fictitious connecting line.

According to a further preferred embodiment, the second section of the at least one first leg and the second section of the at least one second leg have the same length. With regard to the rotation of the at least one first leg and the at least one second leg relative to the connecting element, the axes of rotation preferably lie on a third fictitious or real connecting line. It is preferred that the second connecting line, the third connecting line and the second sections of the at least one first leg and the at least one second leg form a second trapezoid. The trapezium can be a parallelogram if the second sections each have the same length and further the second and third connecting lines have the same length.

Changing the length of the connecting element advantageously changes both the first trapezoid and the second trapezoid.

Of course, it would also be conceivable for the second section of the at least one first leg and the second section of the at least one second leg to have different lengths. The at least one second leg could preferably have a second section which is longer than the second section of the at least one first leg. Thus, advantageously, the second juncture line, the third juncture line, and the second portions of the at least one first leg and the at least one second leg would form a general quadrilateral rather than the second trapezoid. Such an advantageous configuration means that the seat part or the seat surface is inclined relative to the longitudinal axis X. With a corresponding change in height, or a displacement of the seat part along the height axis Z, the seat part also undergoes a change in inclination.

Advantageously, a change in inclination when the seat position changes along the vertical axis Z and along the longitudinal axis X in the embodiment described, in which the arrangement of the legs describes a general quadrilateral, can be compensated for by modifying the length of the connecting element, so that the carrier element or the seat surface is aligned essentially horizontally or parallel to the body floor. This can preferably be done automatically. For this purpose, the operating and control device can be connected to appropriate sensors, which determine a corresponding change in the seat position. The operating and control device can then calculate the necessary modification of the length of the connecting element and control the connecting element accordingly.

According to a further preferred embodiment, two first legs and two second legs are provided. The two first legs are preferably spaced apart from one another along the width axis Y. The two first legs can preferably be rotated about the same axes of rotation. The two second legs are advantageously spaced apart from one another along the width axis Y. The two second legs can preferably be rotated about the same axes of rotation.

The above-mentioned axes of rotation, about which the pairs of the first limbs or the second limbs can each be rotated, can preferably be axes which are mounted in a corresponding pivot bearing of the limbs. The respective axis of rotation can be a continuous real axis, which is mounted in the corresponding pivot bearing of the legs. The axis of rotation can also be a continuous imaginary axis which extends through corresponding pivot bearings of the two legs.

The limbs lying opposite one another along the width axis Y are preferably connected by means of at least one cross connection. These cross-connections can advantageously be realized through the carrier element or through the seat part. However, it would also be conceivable for the cross-connections to be realized by other struts, rods, etc.

According to a further preferred embodiment, at least one carrier element must be a plate-like element which extends along the longitudinal axis X and the width axis Y. The first and second legs are preferably arranged on the underside of this plate-like element. Accordingly, the first or the first longitudinal connection(s) is/are realized by the plate-like element. The seat part is advantageously arranged on the upper side on the plate-like element. However, it would also be conceivable for several carrier elements to be provided. The respective transverse connections and the first longitudinal connections would then advantageously be realized by the seat part.

According to a further preferred embodiment, the angle setting device comprises a fixing device which fixes a set angle α. The alignment of the at least one first leg relative to the carrier element or relative to the seat substructure is therefore preferably fixed and held by the fixing device. Likewise, the alignment of the at least one second leg relative to the carrier element or relative to the seat substructure is fixed and maintained by the mechanical coupling between the at least one first and the at least one second leg. Such a locking device can preferably be what is known as a “recliner”. Advantageously, the angle adjustment device includes a drive, by means of which the locking device is driven in order to change the angle α. The angle adjustment device is preferably an electrically controllable gear unit. The angle adjustment device preferably includes a control unit which controls the drive. It is advantageous here that specific seating positions can be stored in the control unit. The user can then switch between the saved positions. An operating device is preferably provided, by means of which the user can make appropriate entries.

According to a further preferred embodiment, the device is a modular component. Accordingly, the device for adjusting a seat position for a vehicle seat is advantageously not integrated into other structural components of a vehicle seat. Advantageously, the device can be arranged between the seat substructure and the seat part. Appropriate fastening elements only have to be provided or provided. As a result, the structure of the seat substructure can be simplified. An advantageous vertical suspension, which is independent of the device due to the modular design, could thus be reduced to its main task, the isolation of the vibrations and the maintenance of the height level. The modular design of the device also makes it possible to easily retrofit existing vehicle seats with this device.

The present object is also achieved by a vehicle seat with a device according to one of the described embodiments.

The vehicle seat can be equipped individually or in combination with all of the features already described above within the context of the device for adjusting a seat position for a vehicle seat and vice versa.

The vehicle seat can advantageously include a scissor frame, by means of which the vehicle seat is attached to the vehicle or the body floor. Furthermore, it is advantageous that the vehicle seat includes a spring and/or damping device for cushioning/damping vertical and/or horizontal vibrations. Due to the preferred modular structure already described, the seat substructure can be configured more simply.

According to a further embodiment, the vehicle seat can comprise a device for adjusting the seat position along the longitudinal axis X. This can be, for example, a rail system on the body floor, on which the seat substructure is arranged in a displaceable manner.

Furthermore, it is preferred if the vehicle seat includes a device for adjusting the inclination of the seat part.

Further advantages, aims and properties of the present invention are explained on the basis of the following description of the appended figures. Similar components can have the same reference numbers in the different embodiments.

• 1 a, 1 b eine seitliche Ansicht des Fahrzeugsitzes nach einer Ausführungsform;
• 2a bis 2c eine Ansicht des Fahrzeugsitzes nach einer Ausführungsform in verschiedenen Sitzpositionen;
• 3a bis 3c eine Ansicht des Fahrzeugsitzes nach einer Ausführungsform in verschiedenen Sitzpositionen;
• 4a bis 4d eine Ansicht des Fahrzeugsitzes nach einer Ausführungsform in verschiedenen Sitzpositionen;
• 5a bis 5c eine Ansicht des Fahrzeugsitzes nach einer Ausführungsform in verschiedenen Sitzpositionen;
• 6 Detailansicht umfassend die erste Drehasche;
• 7 Verstellkurve des Fahrzeugsitzes;
• 8 isometrische Ansicht der Vorrichtung zur Einstellung einer Sitzposition;
• 9 isometrische Ansicht der Vorrichtung zur Einstellung einer Sitzposition;
• 10 seitliche Ansicht der Vorrichtung zur Einstellung einer Sitzposition;
• 11 Draufsicht der Vorrichtung zur Einstellung einer Sitzposition;
• 12 seitliche Ansicht der Vorrichtung zur Einstellung einer Sitzposition;
• 13 seitliche Ansicht der Vorrichtung zur Einstellung einer Sitzposition;
• 14 Draufsicht der Vorrichtung zur Einstellung einer Sitzposition;
• 15a bis 15c seitliche Ansicht der Vorrichtung zur Einstellung einer Sitzposition in verschiedenen Neigungspositionen.

In the figures show:

• 1 a , 1 b a side view of the vehicle seat according to an embodiment;
• 2a until 2c a view of the vehicle seat according to an embodiment in different seating positions;
• 3a until 3c a view of the vehicle seat according to an embodiment in different seating positions;
• 4a until 4d a view of the vehicle seat according to an embodiment in different seating positions;
• 5a until 5c a view of the vehicle seat according to an embodiment in different seating positions;
• 6 Detail view including the first pivot bracket;
• 7 adjustment curve of the vehicle seat;
• 8th isometric view of the device for adjusting a seat position;
• 9 isometric view of the device for adjusting a seat position;
• 10 side view of the device for adjusting a seat position;
• 11 Plan view of the device for adjusting a seat position;
• 12 side view of the device for adjusting a seat position;
• 13 side view of the device for adjusting a seat position;
• 14 Plan view of the device for adjusting a seat position;
• 15a until 15c side view of the device for adjusting a seat position in different tilt positions.

In the 1 until 15c a device 2 for adjusting a seat position for a vehicle seat 1 is shown. The device 2 comprises at least one carrier element 3 for a seat part 4 and can be connected to a seat substructure 5 . The device 2 further comprises at least one first leg 6 and at least one second leg 7, the legs 6, 7 being rotatably arranged on the seat substructure 5 and the at least one support element 3, the at least one first leg 6 and the at least one second leg 7 are mechanically coupled by a connecting element 19, the length of which is modifiable, a modification of the length of the connecting element 19 causing a change in an inclination angle θ of the supporting element 3.

The vehicle seat 1 and the device 2 for adjusting the seat position extend along a height axis Z, a longitudinal axis X and a width axis Y.

The vehicle seat 1 can of course include a backrest, a headboard and armrests, as is the case, for example, in FIGS 1a and 1b is shown. The seat part 4 can comprise a shell element with an upholstery element arranged thereon or only an upholstery element. The seat substructure 5 can advantageously include a scissor frame 27, by means of which the vehicle seat 1 is attached to the vehicle or the body floor 29. Furthermore, it is advantageous that the seat substructure 5 includes a spring and/or damping device 28 for cushioning/damping vertical and/or horizontal vibrations. This is in the 1a and 1b implied.

How from the 1 until 15c As can be seen, the device 2 for adjusting a seat position is a modular component and can therefore be integrated in a vehicle seat 1 in the simplest way. Furthermore, older vehicle seats can be retrofitted with such a modular component.

The at least one first leg 6 is arranged behind the at least one second leg 7 along the longitudinal axis X. Furthermore, the at least one first leg 6 and the at least one second leg 7 are connected along the longitudinal axis X by means of a first longitudinal connection 9 . The first longitudinal connection 9 is realized by the at least one carrier element 3 or by the seat part 4 . In the 8th until 15c the carrier element 3 comprises a plate-like element 30 on which the seat part 4 can be arranged. The first longitudinal connection 9 is thus provided by the plate-like element 30.

Furthermore, the at least one first leg 6 is connected along the longitudinal axis X to the at least one second leg 7 by means of a second longitudinal connection 10 which is implemented by the seat substructure 5 .

The at least one first leg 6 and the at least one second leg 7 each have a first section 6a, 7a and a second section 6b, 7b. The first section 6a, 7a and the second section 6b, 7b extend essentially in a straight line and enclose an angle β, as a result of which the at least one first leg 6 and the at least one second leg 7 are essentially L-shaped. The angle β is accordingly in a range between 20° and 100°, preferably between 45° and 90°, more preferably between 95° and 85°, more preferably 90°. Accordingly, a kink area 6c, 7c is provided between the first section 6a, 7a and the second section 6b, 7b.

The at least one first leg 6 is rotatably mounted about a first axis of rotation 11 relative to the carrier element 3 . The at least one first leg 6 and the carrier element 3 enclose a first angle α. Advantageously, the angle α extends between a central axis of the first leg 6 and an imaginary reference line of the carrier element 3, which runs essentially perpendicularly to the seat part 4.

The at least one second leg 7 is rotatably mounted about a second axis of rotation 12 relative to the carrier element 3 . The respective first section 6a, 7a of the at least one first leg 6 and of the at least one second leg 7 have an upper end region in which the axis of rotation 11, 12 is arranged with respect to the rotation relative to the carrier element 3.

The at least one first leg 6 is mounted so that it can rotate about a third axis of rotation 13 relative to the seat substructure 5 . The at least one second leg 7 is mounted so that it can rotate about a fourth axis of rotation 14 relative to the seat substructure 5 . The third axis of rotation 13 and the fourth axis of rotation 14 are arranged in the respective bend area 6c, 7c. Accordingly, the first section 6a of the first leg 6 would essentially extend between the first axis of rotation 11 and the third axis of rotation 13 . The first section 7a of the second leg 7 extends essentially between the second axis of rotation 12 and the fourth axis of rotation 14.

The connecting element 19 is arranged between the second section 6b of the first leg 6 and the second section 7b of the second leg 7 . The first leg 6 is mounted such that it can rotate about a fifth axis of rotation 15 relative to the connecting element 19 . The second leg 7 is rotatably mounted about a sixth axis of rotation 16 relative to the connecting element 19 . The fifth axis of rotation 15 and the sixth axis of rotation 16 are each arranged in a lower end region of the second sections 6b, 7b. The respective second section 6b, 7b thus extends essentially between the third axis of rotation 13 and the fifth axis of rotation 15, or between the fourth axis of rotation 14 and the sixth axis of rotation 16. Accordingly, a third longitudinal connection 23, the length of which can be modified, can be defined along the longitudinal axis X which extends between the second section 6b of the at least one first leg 6 and the second section 7b of the at least one second leg 7 and is realized by the connecting element 19.

The device 2 comprises two first legs 6 and two second legs 7. The two first legs 6 and the two second legs 7 are each spaced apart from one another along the width axis Y. The two opposite first legs 6 and the two opposite second legs 7 are essentially identical. The further description of the legs 6, 7 in the form of at least one leg 6, 7 is therefore to be applied to the respective pair of legs. The two first legs 6 and the two second legs 7 can also be rotated about the same axes of rotation 11, 12, 13, 14, 15, 16. Furthermore, the opposite legs 6 , 7 along the width axis Y are connected by means of at least one cross connection 24 . Such a cross connection 24 is realized by the carrier element 3, which is designed as a plate-like element 30. Further struts, plates, etc. can also be present, which also form the cross connection 24 .

If the length of the connecting element 19 is modified, the distance between the fifth axis of rotation 15 and the sixth axis of rotation 16, or between the two second sections 6b, 7b of the legs 6, 7, is reduced or increased.

The modification of the length of the connecting element 19 causes the at least one second leg 7 to rotate about at least the sixth axis of rotation 16 and the fourth axis of rotation 14. Furthermore, the modification of the length of the connecting element 19 can also cause the at least one second leg 7 to rotate about the second Axis of rotation 12 cause. The angle α is advantageously fixed during the modification, so that a rotation about the first axis of rotation 11 is not possible. The at least one first leg 6 is thus not rotated when the length of the connecting element 19 is modified.

The at least one second leg 7 is connected indirectly to the at least one carrier element 3 . The at least one second leg 7 is connected to the carrier element 3 via a spacer element or a connecting rod 33 . The spacer element or connecting rod 33 can be rotated about the second axis of rotation 12 relative to the at least one second leg 7 . Furthermore, the spacer element or connecting rod 33 can be rotated about a seventh axis of rotation 34 relative to the carrier element 3 . The spacer element 33 provides an additional degree of freedom, which makes it easier to adjust the inclination of the seat part 4 .

The angle of inclination θ extends between a central axis 38 of the at least one carrier element 3 and a reference axis 39 which is essentially parallel to the longitudinal axis X of the device 2 . The change in the angle of inclination θ is proportional to the change in the length of the connecting element 19. In FIGS 4a and 15a here an inclination of the carrier element 3 or of the seat part 4 is shown backwards. The second axis of rotation 12, the seventh axis of rotation 34 and thus a front edge region of the carrier element 3 or of the seat part 4 are displaced upwards along the vertical axis Z, or pivoted. The length of the connecting element 19 has been increased and the sixth axis of rotation 16 has been shifted forward essentially along the longitudinal axis X. Accordingly, the angle of inclination θ has positive values. In the 4b and 15b the carrier element 3 or the seat part 4 is aligned essentially horizontally. The angle of inclination θ between a central axis 38 and the reference axis 39 is thus essentially 0°. In the 4c and 15c a forward inclination of the carrier element 3 or of the seat part 4 is shown. The second axis of rotation 12, the seventh axis of rotation 34 and thus a front edge region of the carrier element 3 or of the seat part 4 is thereby displaced or pivoted downwards along the vertical axis Z. The length of the connecting element 19 has been reduced and the sixth axis of rotation 16 has been shifted backwards essentially along the longitudinal axis X. In this case, the inclination angle θ has negative values. In 4d the vehicle seat 1 is shown, with different inclination settings of the vehicle seat 1 being indicated.

The spacer element, or the connecting rod 33 rotates at the changes in inclination according to 4a until 4c and 15a until 15c accordingly. With the substantially horizontal orientation of the seat part 4 in the 4b and 15b the spacer element or the connecting rod 33 is aligned in such a way that the second axis of rotation 12 and the seventh axis of rotation 34 are arranged essentially along the height axis Z one above the other. In the inclination arrangement of the seat part 4 according to the 4a and 15a the spacer element or the connecting rod 33 is aligned in such a way that the seventh axis of rotation 34 is displaced forwards along the longitudinal direction X relative to the second axis of rotation 12 . In the inclination arrangement of the seat part 4 according to the 4c and 15c the spacer element or the connecting rod 33 is aligned in such a way that the seventh axis of rotation 34 is shifted backwards along the longitudinal direction X relative to the second axis of rotation 12 .

The length of the connecting element 19 is continuously adjustable. In addition, the connecting element 19 is suitable and intended for maintaining its modifiable length, preferably until another modification is carried out. Corresponding undesired application of force to the device 2 or the connecting element 19 therefore does not cause an undesired change in the length of the connecting element 19. The connecting element 19 can be a lockable gas spring or an actuating element. However, other similar elements are also conceivable, by means of which the length can be modified and fixed. An actuating element includes, for example, a spindle lifting gear, which is driven by a drive, for example an electric motor. The rotating movement of the drive is converted into a linear movement by the spindle lifting gear. In the rest position, the screw jack blocks further linear movement. Lockable gas springs can be steplessly locked in the direction of tension or compression. As a rule, lockable gas springs include a piston-valve system that separates the two pressure chambers in the spring from one another. This allows stepless blocking without effort. If the valve tappet is released from the outside and the exchange between the two pressure chambers is interrupted, the gas spring blocks.

The connecting element can be operated manually by means of an operating element, for example a lever. Alternatively or cumulatively, an operating and control device 38 can be provided, by means of which the connecting element 19 can be controlled. The one operating and control device 38 can include an operating element 40, which can be a lever, a button, a joystick or the like. The operating and control device 38 can also include a memory device 39, by means of which specific length values of the connecting element 19 can be stored. For example, this is in 4d shown. The user can therefore directly control certain preferred inclination settings.

The angle α can be adjusted by an angle adjustment device 8 . A change in the angle α causes a displacement of the at least one support element 3 along a vertical axis Z and along a longitudinal axis X. A change in the angle α, which causes a displacement of the at least one support element 3 downwards along the vertical axis Z, also causes a displacement of the at least one carrier element 3 along the longitudinal axis X to the front. A change in the angle α, which causes an upward displacement of the at least one support element 3 along the vertical axis Z, also causes a backward displacement of the at least one support element 3 along the longitudinal axis X.

The first section 6a of the at least one first leg 6 and the first section 7a of the at least one second leg 7 have the same length. The first axis of rotation 11 and the second axis of rotation 12 lie on a first fictitious or real connecting line 17. Likewise, the third axis of rotation 13 and the fourth axis of rotation 14 lie on a second fictitious or real connecting line 18. The first connecting line 17, the second connecting line 18 and the first sections 6a, 7a of the at least one first leg 6 and the at least one second leg 7 thus form a first trapezium 21. This is good in 2c recognizable. Since the two connecting lines 17 and 18 have the same length, the trapezoid 21 is a parallelogram.

Out of 9 It can be seen that in the end regions of the two first legs 6, in the end regions of the two second legs 7 and in the buckling regions 6c, 7c, a swivel joint or a pivot bearing is arranged in each case. The respective axis of rotation 11, 12, 13, 14, 15, 16 is therefore fictitious. Of course, a continuous real axis of rotation 11, 12, 13, 14 could also be provided in each case.

The fifth axis of rotation 15 and the sixth axis of rotation 16 lie on a third fictitious or real connecting line 20.

In the embodiments according to 2a until 2c and 4a until 4d the second section 6b of the at least one first leg 6 and the second section 7b of the at least one second leg 7 have the same length. Accordingly, the second connecting line 18, the third connecting line 20 and the second sections 6b, 7b form a second trapezoid 22.

In the embodiments according to 3a until 3c and 5a until 5c the second section 7b of the at least one second leg 7 is longer than the second section 6b of the at least one first leg 6. The second connecting line 18, the third connecting line 20 and the second sections 6b, 7b therefore form a general quadrilateral 31.

As a result, when the angle α changes, in addition to a change in the seat position along the vertical axis Z and a change in the seat position along the longitudinal axis X, a change in the inclination of the seat part 4 or the support element 3 can also be caused. By appropriately adjusting the length of the connecting element 19, with such a change in the Seat position, the inclination of the seat part 4 can be adjusted such that the seat part 4 is aligned horizontally.

The first connection line 18 can therefore correspond to the first longitudinal connection 9 . In the 1 until 14 is shown, however, that the first longitudinal connection 9 and the first notional connection line 18 along the height axis Z are spaced apart. The second connection line 18 corresponds to the second longitudinal connection 10, although the invention is not limited thereto. The third connecting line 20 can, but does not have to, correspond to the third longitudinal connection 23 or the connecting element 19 . The mechanical coupling preferably comprises the first longitudinal connection 9, the second longitudinal connection 10, the third longitudinal connection 23. Furthermore, in the embodiment in which the first limbs 6 and second limbs 7 are designed as pairs of limbs, the transverse connection 24 can be considered to belong to the mechanical coupling become.

The at least one first leg 6 or the corresponding pair of legs is/are arranged directly on the carrier element 3 via a pivot bearing, or is rotatably mounted. The first axis of rotation 11 accordingly runs centrally through this pivot bearing. The at least one second leg 7 or the corresponding pair of legs is arranged or mounted indirectly via the spacer element 33 and a corresponding pivot bearing on the carrier element 3 . Furthermore, the spacer element 33 is arranged on the carrier element 3 by means of a further pivot bearing. The second axis of rotation 12 accordingly runs centrally through this pivot bearing. The at least one second leg 7 or the corresponding pair of legs can also be arranged or mounted directly on the carrier element 3 via a pivot bearing.

In the embodiment based on 2a until 2c the kinematics of the height adjustment are implemented in the form of a second trapezium 22. This trapezium 22 can be changed in order to allow an additional inclination adjustment via the degree of freedom of the movable connecting rod 33. When the height changes, the seat part 4 moves up (down) parallel to the starting position, ie there is no change in the angle in the XY plane with respect to the seat part 4 . In this case, the angle can only be changed by changing the length of the connecting element 19 . At the same time, the seat part 4 moves backwards (forwards) in the longitudinal direction X due to the pivoting movement of the legs 6, 6. If no inclination adjustment is necessary in this embodiment, the kinematics can also be designed as a simple parallelogram. The connecting rod 33 can also be omitted here and is then connected directly to the carrier element 3 adapted for this purpose via the second axis of rotation 12 . In 2a a lowest position is shown, in which the lowest seat height is assumed. Furthermore, the seating position in the longitudinal direction X forward is at its maximum. In 2c an uppermost position is shown, in which the maximum seat height and the maximum seat position in the longitudinal direction X is taken backwards. In 2 B a corresponding middle seat position is shown. However, the seat position in the longitudinal direction can be further modified if necessary by an additional adjustment device.

In the embodiment based on 3a until 3c the kinematics of the height adjustment are implemented in the form of a general square. This allows for a further change in inclination of the seat top in the XY plane. When there is a change in height, the seat part 4 does not move up (down) parallel to the starting position, ie there is an angle change in the XY plane with respect to the seat part 4 . This kinematic sequence is achieved by different geometries of the two legs 6, 7. In the illustrations shown, the seat inclines forwards or backwards when there is a change in height. An additional inclination adjustment is possible by means of the connecting element 19, which can be modified in length. However, the connecting element 19 can also be provided as a rigid element. Here, however, it is necessary for a spacer element 33 or connecting rod to be provided. By pivoting the spacer element 33 about the second axis of rotation 12 and the seventh axis of rotation 34, a corresponding compensation along the longitudinal axis X can take place, whereby an inclination of the seat part 4 is avoided. Accordingly, the height of the seat part 4 can be changed upwards (downwards) parallel to the starting position, ie there is no change in the angle in the XY plane with respect to the seat part 4 . In 3a a lowest position is shown, in which the lowest seat height is assumed. Furthermore, the seating position in the longitudinal direction X forward is at its maximum. In 3c an uppermost position is shown, in which the maximum seat height and the maximum seat position in the longitudinal direction X is taken backwards. A corresponding rotation of the connecting rod 33 means that the seat part 4 is essentially horizontal. In 3b a corresponding middle seat position is shown.

However, the seat position in the longitudinal direction can be further modified if necessary by an additional adjustment device.

In the embodiment based on 4a until 4c kinematics are shown by means of a second trapezium 22 . In this kinematics, the inclination is adjusted by changing the length of the connecting element 19 . In the case shown, an angle change of the XY plane around the Y axis, starting from the middle position, of approx. +/-3° is provided. In the version described, the connecting element 19 is designed as a lockable gas spring. This includes a defined extension force and also defined end positions (lengthening/extending). Other designs for this connecting element 19 are also being considered, such as an electrical variant in the form of a screw jack with the possibility of memorization. In 4b a sitting position is shown, in which the seat part 4 is aligned essentially horizontally or parallel to a plane XY, which is spanned by the longitudinal axis X and the width axis Y. In 4a a sitting position is shown in which the seat part 4 inclines backwards. Compared to the seating position in 4b the connecting element 19 has a greater length here. In 4c a sitting position is shown in which the seat part 4 inclines forward. Compared to the seating position in 4b the connecting element 19 has a shorter length here. Here, too, a corresponding compensation of the deflection along the longitudinal axis is made possible by rotating the connecting rod 33 .

In the embodiment based on 5a until 5c a kinematics of the height adjustment is implemented in the form of a general square, which allows an additional inclination adjustment by means of a length-modifiable connecting element 19, similar to the embodiment according to FIGS 4a until 4c . In contrast to this embodiment, the change in inclination in the lift-up area is mainly used here to enable the plane XY to be horizontal. In the lower to middle positions, the system behaves similarly to the embodiment based on FIG 5a until 5c . In 4b a sitting position is shown, in which the seat part 4 is aligned essentially horizontally or parallel to a plane XY, which is spanned by the longitudinal axis X and the width axis Y. In 5b a sitting position is shown in which the seat part 4 is aligned essentially horizontally or parallel to the XY plane. In 5a a sitting position is shown in which the seat part 4 inclines backwards. Compared to the seating position in 5b the connecting element 19 has a greater length here. In 5c a sitting position is shown in which the seat part 4 inclines forward. Compared to the seating position in 4b the connecting element 19 has a shorter length here. Here, too, a corresponding compensation of the deflection along the longitudinal axis is made possible by rotating the connecting rod 33 .

In the 6 the section around the first axis of rotation 11 is shown enlarged. In particular, the angle α is clearly visible here. The angle α extends between a central axis 6d of the first leg 6 and an imaginary reference line of the carrier element 3a. This reference line is essentially perpendicular to the plate-like element 30. When the support element 3 or the seat part 4 is aligned without any inclination, in which the seat part 4 runs essentially parallel to the XY plane, the reference line of the support element 3a is essentially parallel to the height axis Z. The angle α is in a range between 0° and 140°. The angle α is preferably in a range between 0° and 120°. More preferably, the angle α is in a range between 0° and 90°.

In the 1a , 1 b and 7 an adjustment curve 32 of the vehicle seat 1 can be seen. A change in the angle α, which causes a displacement of the at least one support element 3 or the seat part 4 downwards along the vertical axis Z, also causes a displacement of the at least one support element 3 or the seat part 4 along the longitudinal axis X forwards. A change in the angle α, which causes an upward displacement of the at least one carrier element 3 or the seat part 4 along the vertical axis Z, also causes a rearward displacement of the at least one carrier element 3 or the seat part 4 along the longitudinal axis X. In 7 exemplary values are given for the adjustment angle, the offset backwards and the offset upwards. The invention is of course not limited to these values.

In the 8th until 14 the angle adjustment device 8 is clearly visible. The angle adjustment device 8 includes a locking device 25, which can also be referred to as a recliner and which determines a set angle α. Furthermore, the angle adjustment device 8 includes a drive 26, by means of which the locking device 25 is driven in order to change the angle α. The angle adjustment device 8 preferably includes a control unit which controls the drive 26 . It is advantageous here that specific seating positions can be stored in the control unit. The user can then switch between the saved positions. An operating device is preferably provided, by means of which the user can make appropriate entries. The drive 26 is positively connected to a primary shaft 35 . The primary shaft 35, which is provided for reasons of space, extends extends from the right to the left side and includes at both ends a spur gear 36 that is also positively connected. The spur gears 36 of the primary shaft 35 transmit the force further to a further spur gear 37 each, which are also positively connected by means of short secondary axles, each with a locking device 25, or recliner connected. The two locking devices 25 positively connect the first leg 6 to the left and right with the carrier element 3. When the height adjustment is actuated, the drive 26 accordingly generates a torque. The torque and the rotation is transmitted from the primary shaft 35 by means of the spur gears 36, 37 to the secondary shafts which are connected to the locking device 25. The torque is therefore transmitted synchronously to the left and right. This causes the first legs 6 to pivot relative to the carrier element 3 .

The 11 and 14 represent a respective plan view of the device 2, wherein in 12 a section of the device 2 is shown. The 10 and 13 show a side view in which the pivoting of the legs 6, 7 to the carrier element 3 can be seen. The connection element 19, which can be embodied as a rigid element or an element whose length can be changed, assumes the equality or forced control of the first leg 6.

Such a device 2 can be designed separately from the vertical suspension. Influencing the height adjustment and spring deflection is therefore impossible. The device offers an ergonomic adjustment of the seat and creates a height-dependent distance to the steering wheel and pedals.

Reference List

1

vehicle seat

2

Device for adjusting a seat position

3

carrier element

3a

Reference line of the support element

4

seat part

5

seat base

6

first leg

6a

first section of the first leg

6b

second section of the first leg

6c

Kink area of the first leg

6d

Central axis of the first leg

7

second leg

7a

first portion of the second leg

7b

second section of the second leg

7c

Kink area of the second leg

8th

angle adjustment device

9

first longitudinal connection

10

second longitudinal connection

11

first axis of rotation

12

second axis of rotation

13

third axis of rotation

14

fourth axis of rotation

15

fifth axis of rotation

16

sixth axis of rotation

17

first connecting line

18

second connecting line

19

fastener

20

third connection line

21

first trapezoid

22

second trapezoid

23

third longitudinal connection

24

cross connection

25

locking device

26

drive

27

scissor frame

28

spring and/or damping device

29

body floor

30

plate-like element

31

square

32

adjustment curve

33

spacer/connecting rod

34

seventh axis of rotation

35

primary shaft

36

spur gear

37

spur gear

38

Operating and control device

39

storage facility

40

control element

Z

elevation axis

X

longitudinal axis

Y

latitude axis

a

angle

β

angle

θ

tilt angle

Claims (10)

Device (2) for adjusting a seat position for a vehicle seat (1), which comprises at least one support element (3) for a seat part (4) and can be connected to a seat substructure (5), characterized in that the device (2) has at least one first leg (6) and at least one second leg (7), wherein the legs (6, 7) can be arranged rotatably on the seat substructure (5) and the at least one support element (3), the at least one first leg (6) and the at least one second leg (7) are mechanically coupled by a connecting element (19) whose length is modifiable, wherein a modification of the length of the connecting element (19) causes a change in an inclination angle (θ) of the support element (3), wherein the at least one first leg (6) and the at least one second leg (7) rotate about a respective axis of rotation (11, 12) relative to the carrier element (3) and about a further axis of rotation (13, 14) each relative to the seat substructure (5 ) are rotatably mounted and wherein the modification of the length of the connecting element (19) involves a rotation of the at least one second leg (7) about at least the axis of rotation (16) with respect to a rotation relative to the connecting element (19) and about the axis of rotation (14) with respect causing a rotation relative to the seat base (5), wherein the modification of the length of the connecting element (19) does not cause any rotation of the at least one first leg (6) and wherein at least one second leg (7) is indirectly connected to the at least one support element (3) connected, the at least one second leg (7) being connected to the carrier element (3) via a spacer element (33), the spacer element (33) being rotatable about an axis of rotation (12) relative to the at least one second leg (7). is, wherein the spacer element (33) is rotatable about a further axis of rotation (34) relative to the carrier element (3). Device (2) after claim 1 , characterized in that the angle of inclination θ extends between a central axis (38) of the at least one carrier element (3) and a reference axis (39) which is essentially parallel to a longitudinal axis (X) of the device (2), the Angle of inclination (θ) is proportional to the length of the connecting element (19). Device (2) after claim 1 or 2 , characterized in that the connecting element (19) is suitable and provided for holding the modified length, the connecting element (19) being controllable by means of an operating and control device (38), the operating and control device (38) a memory device (39) by means of which certain length values of the connecting element (19) can be stored, the length of the connecting element (19) being continuously adjustable, the connecting element (19) being a lockable gas spring or an actuating element, the actuating element being a screw jack includes. Device (2) according to one of the preceding claims, characterized in that the at least one first leg (6) is arranged along the longitudinal axis (X) behind the at least one second leg (7), the at least one first leg (6) along the longitudinal axis (X) is connected to the at least one second leg (7) by means of a first longitudinal connection (9), which is realized by the at least one carrier element (3) or by the seat part (4), the at least one first leg ( 6) and the at least one second leg (7) each have a first section (6a, 7a) and a second section (6b, 7b), the first section (6a, 7a) and the second section (6b, 7b) having a Angle (β) enclose, as a result of which the at least one first leg (6) and the at least one second leg (7) are essentially L-shaped, with between the first section (6a, 7a) and the second section (6b, 6b ) a kink area (6c, 7c) is provided. Device (2) according to one of the preceding claims, characterized in that in an upper end region of the first section (6a) the axis of rotation (11, 12) is arranged with respect to the rotation relative to the carrier element (3), the axis of rotation (13, 14) is located in the buckling area (6c, 7c) with respect to rotation relative to the seat base (5). Device (2) according to one of Claims 4 until 5 , characterized in that the connecting element (19) is arranged between the second section (6b) of the first leg (6) and the second section (7b) of the second leg (7), the respective second section (6b, 7b) being a rotation axis (15, 16) is rotatable relative to the connecting element (19), wherein the rotation axis (15, 16) relative to a rotation of the at least one first leg (6) or the at least one second leg (7) to the connecting element ( 19) is arranged in a lower end area of the respective second section (6b, 7b). Device (2) according to any one of the preceding claims, characterized in that the at least one first leg (6) and the Trä ger element (3) enclose a first angle α, this angle (α) being adjustable by an angle adjustment device (8), a change in the angle (α) causing a displacement of the at least one carrier element (3) along a height axis (Z) and along a longitudinal axis (X), with a change in the angle (α), which causes a downward displacement of the at least one support element (3) along the height axis (Z), at the same time a displacement of the at least one support element (3) along the longitudinal axis ( X) forwards, with a change in the angle (α), which causes an upward displacement of the at least one carrier element (3) along the height axis (Z), at the same time causing a displacement of the at least one carrier element (3) along the longitudinal axis (X ) backwards. Device (2) according to one of Claims 4 - 7 , characterized in that the first section (6a) of the at least one first leg (6) and the first section (7a) of the at least one second leg (7) have the same length, the axes of rotation (11, 12) with respect to the rotation relative to the carrier element (3) of the at least one first leg (6) and of the at least one second leg (7) lie on a first fictitious or real connecting line (17), the axes of rotation (13, 14) with respect to the rotation relative to the Seat substructure (5) of the at least one first leg (6) and the at least one second leg (7) lie on a second fictitious or real connecting line (18), the first connecting line (17), the second connecting line (18) and the first Sections (6a, 7a) of the at least one first leg (6) and of the at least one second leg (7) form a trapezoid (21). Device (2) according to one of Claims 6 until 8th , characterized in that the second section (6b) of the at least one first leg (6) and the second section (7b) of the at least one second leg (7) have the same length, the axes of rotation (15, 16) with respect to the rotation of the at least one first leg (6) and the at least one second leg (7) lie on a third fictitious or real connecting line (20) relative to the connecting element (19), the second connecting line (18), the third connecting line (20) and the second sections (6b, 7b) of the at least one first leg (6) and of the at least one second leg (7) form a second trapezoid (22). Device (2) according to one of the preceding claims, characterized in that two first legs (6) and two second legs (7) are provided, the two first legs (6) being spaced apart from one another along the width axis (Y) and around the the same axes of rotation (11, 13,15), the two second legs (7) being spaced apart from one another along the width axis (Y) and being rotatable about the same axes of rotation (12, 14, 16), the axes along the width axis (Y ) opposing legs (6, 7) are connected by means of at least one cross-connection (23).

Images